https://developer.android.com/reference/android/support/v17/leanback/app/RowsSupportFragment?authuser=0
RowsSupportFragment | API reference | Android Developers
api referenceandroiddevelopers
https://developer.android.com/reference/androidx/leanback/app/RowsSupportFragment.MainFragmentAdapter?authuser=1
RowsSupportFragment.MainFragmentAdapter | API reference | Android Developers
api referenceandroiddevelopers